The Fortin finger test.
Levin
S M
SM
D018771:Arthralgia / Q000175:diagnosis* / Q000209:etiology; D005385:Fingers; D006801:Humans; D010173:Palpation; D010817:Physician-Patient Relations; D012446:Sacroiliac Joint / Q000503:physiopathology*; D014925:Wit and Humor as Topic